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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 11 |
| 3 | 32 |
| 4 | 89 |
| 5 | 244 |
| 6 | 659 |
| 7 | 1760 |
| 8 | 4657 |
| 9 | 12228 |
| 10 | 31899 |
| 11 | 82752 |
| 12 | 213641 |
| 13 | 549236 |
| 14 | 1406755 |
| 15 | 3591232 |
| 16 | 9140833 |
| 17 | 23204612 |
| 18 | 58765099 |
| 19 | 148496608 |
| 20 | 374496953 |
| 21 | 942729588 |
| 22 | 2369172915 |
| 23 | 5944748064 |
| 24 | 14895231121 |
| 25 | 37272007108 |
| 26 | 93149401019 |
| 27 | 232527917312 |
[4,11,32,89,244,659,1760,4657,12228,31899,82752, 213641,549236,1406755,3591232,9140833,23204612, 58765099,148496608,374496953,942729588,2369172915, 5944748064,14895231121,37272007108,93149401019, 232527917312] |